Belton, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.2 °C (low) to 18.1 °C (high). Annual precipitation averages 1073.9 Millimeters. Belton is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.6 °C | 3.8 °C | 34.04 mm |
| February | -4.7 °C | 6.2 °C | 45.72 mm |
| March | 0.7 °C | 12.3 °C | 67.82 mm |
| April | 6.6 °C | 18.1 °C | 105.92 mm |
| May | 12.8 °C | 23.2 °C | 141.99 mm |
| June | 18.1 °C | 28.4 °C | 145.29 mm |
| July | 20.5 °C | 30.9 °C | 114.81 mm |
| August | 19.4 °C | 30.3 °C | 111.25 mm |
| September | 14.7 °C | 26.1 °C | 107.19 mm |
| October | 7.7 °C | 19.3 °C | 93.98 mm |
| November | 1.3 °C | 12.4 °C | 59.94 mm |
| December | -4.1 °C | 5.8 °C | 45.97 mm |
| Annual | 7.2 °C | 18.1 °C | 1073.92 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |